Wow
There are pilots in BA earning £200k! Not many admittedly, but comfortably exceeding £100k is not unusual.
As stated before, £200k would have to be a very senior long haul trainer and a lot of overtime without a life outside work. I wouldn't say it was the norm would you? Perhaps in the top 0.25% at a guess, not really representative.
Knee Trembler
If you decide to chose BA there will be certain benifits, but if pay is a big issue then there are better opportunities out there. What you will get is a nice flight deck environment, a stable roster and good benifits. Time to command could be between 8-15 years depending upon various scenarios such as expansion and part-time opportunities. The pension is not great, but at least you know that when you join.
Chatting to an interviewer the other day; his opinion is that most people chose BA or Virgin, a few Easy.
Best of luck